CNN reports that many people have become so besotted by the beauty of the planet Pandora in Avatar, they're leaving theaters depressed, noting "[s]uggestions for battling feelings of depression after seeing the movie include things like playing 'Avatar' video games." Or perhaps explore a virtual world made to look like the planet, for as it happens, there's an island in Second Life dubbed Pandora Magic, and as you might expect, it's already inhabited by Na'vi-like avatars, and offers a pretty good facsimile of the place depicted by the movie (at many many times less its production budget):
(Not sure what part of the movie that's from.) Curiously, Pandora and Avatar are not represented in Multiverse, a 3D virtual world that's been in development for many years, which counts Avatar creator James Cameron himself as an investor. (There is, however, a web-based Multiverse Avatar casual game tie-in promoting McDonald's and Coca Cola.) As with the Second Life roleplaying area inspired by the Dune novels (which was shut down by Frank Herbert's legal executors) Pandora Magic seems to be another example of a general rule with user-generated content: If you don't build it, your fans will build it themselves. Especially if many people are pining for the planet already.